<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>帅哥美女走一走</title>
</head>

<body>
    <div id="app">
        <ul>
            <li v-for="(item,index) in yi">{{item}}</li>
        </ul>
        <button @click="jj(yi[0])">走一走</button>
    </div>
</body>
<script src="./vue.js"></script>
<script>
    const app = new Vue({
        el: '#app',
        data: {
            yi: ['帅哥', '美女', '程序猿'],
        },
        methods: {
            jj(aa) {
                this.yi.push(aa)
                this.yi.shift()
            }
        }

    })
</script>

</html>